The input power of a three-phase motor is measured by two wattmeter method. If the readings were 12.9KW and -6.1KW then the reactive power is O 6800.00 O 19000.00 O 32908.97 O 11777.95

Q: In D.C. generator, wave winding is used for O High voltage, high current O High voltage, low current…

A: Answer :- B Option (b) is correct.

Q: An electric motor with a power factor less than 1 and lagging has a reactive power component a)…

A: Power factor<1 Lagging power factor

Q: Find the amount of work the 3-phase motor can do in 3hrs

A:

Q: If the alternating voltage v= 180 sin(480t), then the frequency will be O 79.36 Hz O 50 Hz O 76.39…

A: Consider the expression for the alternating voltage is, v=180sin(480t)

Q: A 3-phase induction motor has 8 poles and the operating frequency is 50HZ. The synchronous speed…

A: 3-Phase induction machine- When three-phase stator displaced by 120' is supplied by 3-phase current…

Q: A 3-phase induction motor draws 50 kW from a 220 V, 50 Hz mains. The rotor emf makes 100…

A: Given, A 3-phase induction motor draws, Electrical input = 50 kW Stator losses = 2 kW Supplied…

Q: A three-phase 400 V motor draws 10 A at 0.8 lagging power factor. The power is consumed by this…

A:

Q: 27 in crlinr cal rotor SYchronous Genrator (8) what is the relation Bet ween the Angle( in the Plot…

A: There are leading and lagging Power factor phasor diagrams given.

Q: Q1/ Find the RMS value of lo in the unbalanced three-phase circuit. 0.40 j20 a 1.60 j4 A 780 1540…

A: The solution can be achieved as follows.

Q: 7. Three sinusoidal voltage source of three phase generator have a. Inverse frequencies b. Random…

A:

Q: When 40V DC voltage is applied to a single-phase AC motor, it draws 1A current. When 200v-50Hz AC is…

A:

Q: If the waveform has positive phase angle then its shifted to the left Select one: True False

A: Phase angle is defined as the angular displacement of waveform from the refrence point. In most of…

Q: A synchronous generator generates 310 V at 50 Hz when the field current is 4.1A. The e.m.f generated…

A:

Q: If you have 2 alternators delivering power to a load at a frequency of 60 hz, how can you make…

A: We know that reactive power is strongly related with excitation while active power is related with…

Q: SINE(0 6Vp-p 1.5K) R₁ LL 2.5 mH 100 PL On the load, find the Power (P) in Watts (W) R A 180//180 Ω…

A: Given Data: A series RL circuit with, Peak-to-peak voltage Vpp=6 V Frequency f=1.5 kHz To Find:…

Q: two 3phase alternators in parallel are both operating at the same frequency. What is theremedy if…

A: Parallel operation of Alternator AC power systems are often interconnected for efficiency, reliable…

Q: A lagging system with a complex load has a power factor of 0.75 and an applied voltage of 200V. if…

A: Given data, A lagging system has, Power factor cosϕ=0.75. Voltage, VL=200 V. Apparent power, S=10…

Q: An 8 kVA motor operates at a 0.5 power factor, the reactive power is then: Select one: O None of the…

A: Given: Motor KVA rating, S=8 KVA Power factor, cosθ=0.5

Q: Determine the generator resistance if the noise factor is 3 and the equivalent noise resistance is…

A: Given data, Noise factor = 3 Equivalent noise resistance = 10 kΩ

Q: A synchronous generator has 15 slots per pole. If each coil spans 7 slot pitches, the value 0.5877…

A: Pitch factor (Kp)=cosα2Coil span angle =βshort pitch angle =α(β)+ (α)=180°

Q: The load sharing between two parallel connected synchronous generators may be adjusted by varying…

A:

Q: Consider the following circuit, the value of Ris 2 220V f=50HZ Draw the power triangle indicating…

A:

Q: 440 Vac 400 Hz generator is connected to a series circuit with a 16 Q resistor, a 11.9-m inductor,…

A: In this question we will find power factor of given series circuit.....

Q: determine the current in each branch using Nodal Analysis

A: It is given that: Zx=100∠0°

Q: The unit for three phase apparent power is Select one: O a. KW O b. V O C. KVA O d. KVAR

A: The apparent power is defined as the combination of the reactive power and the true power and is…

Q: The open circuit characteristics (O.C.C) of an alternator is drawn between O Eo V/S If O Eo V/S Isc…

A: The open circuit test on the generator is performed by opening the armature terminals of the…

Q: What will be the frequency (cycles per second) of AC voltage of a 10 pole AC generator which rotates…

A: Given a AC generator with, Total number of poles, P = 10. Synchronous speed, Ns = 1200 rpm.

Q: A 3-phase induction motor has 4 poles and the operating frequency is 55HZ. The synchronous speed…

A: In this we will find synchronous speed..

Q: If the voltage is 400v its 3 phase its frequency is 50hz it has 4 poles per phase its running speed…

A: Step 1:

Q: In an AC circuit when a KVAR is equal to KW value, it indicates to O Maximum power factor Minimum…

A: The power factor of any circuit measures how effective the active power is being utilized. In the…

Q: 10. Calculate the crest factor if the peak value of current is 10A and the rms value is 2A.

A: It is given that:

Q: A non-sinusoidal voltage (e=20+15sin1000t+ 10sin3000t+5sin4000t) Volt is applied to the circuit…

A: Given, e=20+15sin1000t+10sin3000t+5sin4000tThe RMS value of the voltage…

Q: If the copper loss in the stator is 1.4 kilowatts, the loss in the core is 1.6 kilowatts, and the…

A: Given, Number of poles, P=6 Input power to motor, Pin=48 Kw Copper losses, Pcu=1.4 Kw Core losses,…

Q: A2 sin

A:

Q: When an AC source is connected across a 12.02 resistor, the output voltage is given by AV = (100…

A:

Q: The instantaneous emf from a 400-hz aircraft generator is 95 V when t = 1msec. What is the…

A: In this question we need to find a instantaneous voltage at t= 2msec